Mikaeus, the Unhallowed, Chainbreaker, and Krark-Clan Ironworks

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Chainbreaker on the battlefield
• Krark-Clan Ironworks on the battlefield

Steps

1. Activate Krark-Clan Ironworks by sacrificing Chainbreaker, adding
2. Chainbreaker dies, triggering its undying ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers